Dietary Reference Values Flashcards

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1
Q

What does DRV stand for?

A

Dietary Reference Value

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2
Q

What are the purpose of DRVs?

A

To act as a benchmark

To reflect the nutritional needs of a population

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3
Q

What is the name used to describe the distribution of DRVs?

A

Gaussian Distribution

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4
Q

What does Gaussian distribution mean?

A

It is another term for normal distribution, it follows a bell-shaped curve and assumes that any measurement taken from that curve will be normally distributed.

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5
Q

What is the ‘safety margin’ set for DRVs?

A

The mean value +/- 2.5

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6
Q

Which members of the population do DRVs solely apply to?

A

Healthy people

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7
Q

What does EAR stand for?

A

Estimated Average Requirement

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8
Q

What is the estimated average requirement?

A

It is the value that refers to and meets the needs of 50% of the population

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9
Q

What does LRNI stand for?

A

Lower Reference Nutrient Intake

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10
Q

What is the lower reference nutrient intake?

A

The LRNI is the amount of a nutrient that is enough for only a small number of people in a group who have low requirements (2.5%) i.e. the majority need more.

It is 2SD below the EAR

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11
Q

What does RNI stand for?

A

Reference Nutrient Intake

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12
Q

What is the reference nutrient intake?

A

The RNI is the amount of a nutrient that is enough to ensure that the needs of nearly all a group (97.5%) are being met.

It is 2SD above the EAR

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13
Q

What is the fourth ‘guideline’ that follows EAR, LRNI, RNI?

A

Safe and Adequate

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14
Q

What is the Safe and Adequate guideline for?

A

For nutrients with insufficient evidence to form an EAR, it is to ensure that the levels recommended for consumption are safe

Example: Vitamin K

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15
Q

Observational studies
Balance studies
Clinical Function Tests
Estimates

What are the above all examples of?

A

The methods by which DRVs are produced

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16
Q

What are the aims of DRVs?

A

To prevent deficiency
To optimise body stores
To produce safe upper limits

17
Q

For which of the nutrients do DRVs exist?

A

Energy

Protein

18
Q

What are the limitations of DRVs?

A

They are derived from experimental data and therefore cannot be generalised
There may be errors in the data due to the use of self-report techniques
There is limited data on certain groups, such as the elderly
The safe margin varies